| Year | 1908 |
| Date | 28-May |
| Volume | 18 |
| Issue | 370 |
| Page | 506 |
| Category | Electrical |
| Part | |
| Title | Small Dynamo and Motor Testing |
| Author | Barton Mott |
| Notes | Two guinea prize in recent Competition (No. 44). Measuring resistance by slide wire bridge, auxiliary speed counter, simple wooden brake, spring balance brake |